<template>
  <view>
    <!-- 使用自定义搜索组件 -->
<!--    <my-search :bgcolor="'#000000'" :radius="3"></my-search> -->
<my-search @click="gotoSearch"></my-search>
    <view class="scroll-view-container">
<!-- 左侧滚动区域 -->
       <scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh+'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>  
        </block>
       </scroll-view>
<!-- 右侧滚动区域 -->
       <scroll-view class="right-scroll-view" scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
         <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
           <!-- 二级分类 -->
           <view class="cate-lv2-title">/{{item2.cat_name}}/</view>
           <!-- 三级分类 -->
           <view class="cate-lv3-list">
             <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
               <image :src="item3.cat_icon"></image>
               <text>{{item3.cat_name}}</text>
             </view>
           </view>
         </view>
       </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        wh:0,
        cateList:[],
        active: 0,
        // 二级分类列表
        cateLevel2:[],
        scrollTop:0
      };
    },
    onLoad(){
      const sysInfo=uni.getSystemInfoSync()
      this.wh=sysInfo.windowHeight-50
      
      this.getCateList()
    },
    methods: {
      // 获取分类列表数据
      async getCateList(){
        const {data:res}=await uni.$http.get('/api/public/v1/categories')
        if(res.meta.status!==200) return uni.$showMsg()
        this.cateList=res.message
        // 为二级分类赋值
        this.cateLevel2=res.message[0].children
      },
      activeChanged(i){
        this.active=i
        // 重新为二级分类赋值
        this.cateLevel2=this.cateList[i].children
        this.scrollTop=this.scrollTop===0?1:0
      },
      // 跳转到商品页面
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
}
.left-scroll-view{
  width:120px;
}
.right-scroll-view{
  background-color: #FFFFFF;
}
.left-scroll-view-item{
  background-color: #F7F7F7;
  line-height:60px;
  text-align:center;
  font-size: 12px;
  &.active {
    background-color: #FFFFFF;
    position: relative;
    &::before {
      content:' ';
      display: block;
      width:3px;
      height:30px;
      background-color: #C00000;
      position: absolute;
      top:50%;
      left: 0;
      transform: translateY(-50%);
    }
  }
}
.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align:center;
  padding:15px 0;
}
.cate-lv3-list{
  display:flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width:33.33%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
    image {
      width:60px;
      height:60px;
    }
    text{}
  }
}

</style>
